S-92245A717 1/2"-13 x 1 1/2" FF-S-85, MS35307-413 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction for long-lasting performance in harsh environments
• High tensile strength of 70,000 PSI ensures reliable load-bearing capacity for demanding industrial applications
• Class 2A thread fit provides consistent, easy assembly while maintaining secure fastening integrity
• External hex drive design offers excellent torque transmission and tool accessibility in confined spaces
• Coarse UNC threading enables faster installation and reduced cross-threading risks in production environments
• Partial threading configuration allows for precise clamping force control across various material thicknesses
• Rockwell B74 hardness rating delivers optimal balance between strength and ductility for vibration resistance

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw delivers exceptional engineering value through its passivated 18-8 stainless steel composition, specifically engineered to combat corrosion in industrial settings where moisture, chemicals, or outdoor exposure are concerns. The coarse thread spacing and Class 2A thread fit significantly reduce installation time while preventing cross-threading incidents in high-volume assembly operations. With its external hex drive and substantial 3/4" head width, this fastener provides superior torque application capability, making it ideal for heavy machinery, structural frameworks, and equipment manufacturing where vibration resistance and long-term reliability are critical. The partial threading design ensures optimal stress distribution across joined materials, preventing joint failure in dynamic load conditions.

Specification Summary & Compliance

This hex head screw maintains precise Class 2A thread fit tolerances per UNC standards with 1/2"-13 coarse thread spacing and right-hand thread direction. Manufacturing complies with Fed. Spec. FF-S-85 (MS35307-413) specifications, ensuring consistent quality and dimensional accuracy. The fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial use.